WO2022247841A1

WO2022247841A1 - Electric drive system three-phase terminal block and vehicle

Info

Publication number: WO2022247841A1
Application number: PCT/CN2022/094819
Authority: WO
Inventors: 赵慧超; 高一; 王宏宝; 韩丹; 徐德才; 张颖
Original assignee: 中国第一汽车股份有限公司
Priority date: 2021-05-25
Filing date: 2022-05-25
Publication date: 2022-12-01
Also published as: CN113241884A

Abstract

Provided are an electric drive system three-phase terminal block and a vehicle. The electric drive system three-phase terminal block comprises: a controller terminal block (1), a low-voltage pin connection part (3), high-voltage copper posts (4), a magnetic ring (9), a rotary transformer signal connector (7), a temperature signal connector (8) and an electric motor three-phase busbar (10). The controller terminal block (1) is inserted into an electric motor housing (2), and the low-voltage pin connection part (3), high-voltage copper posts (4) and magnetic ring (9) are integrated on the controller terminal block (1). The low-voltage pin connection part (3) and the high-voltage copper posts (4) are respectively integrally injection-molded with the controller terminal block (1), a first end of the low-voltage pin connection part (3) is connected to a control board (6), and a second end of the low-voltage pin connection part (3) passes through the controller terminal block (1) to form a slot (32). The rotary transformer signal connector (7) and the temperature signal connector (8) are respectively inserted into the slot (32) and are connected to the control panel (6). The tail ends of the high-voltage copper posts (4) penetrate out of the controller terminal block (1) to form copper bar connecting parts (41), and the magnetic ring (9) is sleeved on the periphery of the high-voltage copper posts (4). The electric motor three-phase busbar (10) is fixedly connected to the copper bar connection parts (41), and the electric motor three-phase busbar (10) is connected to the temperature signal connector (8).

Description

Electric drive system three-phase terminal block and vehicle

This application claims priority to a Chinese patent application with application number 202110572111.X filed with the China Patent Office on May 25, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of a controller terminal block, for example, it relates to a three-phase terminal block of an electric drive system and a vehicle.

Background technique

At present, the three-phase terminal block of the electric drive system on the vehicle is used to connect the motor and the controller. Among them, the high voltage and low voltage of the motor are connected to the controller through different connectors or terminal blocks, and the three-phase busbar of the motor is connected through the three-phase terminal block. Connect with the controller to realize the high-voltage communication between the controller and the motor. The resolver and temperature low-voltage signals are transferred through the external vehicle connector through a separate connector, and then connected to the controller to realize the low-voltage communication between the controller and the motor. This connection method takes up a lot of space, and the signal is easily connected through the external transfer It is subject to electromagnetic interference, and at the same time, the three-phase terminal blocks of the current electric drive system have many structures and low integration.

Based on this, there is an urgent need for a three-phase terminal block of an electric drive system and a vehicle to solve the above-mentioned problems.

Contents of the invention

The application provides a three-phase terminal block for an electric drive system and a vehicle, which have high structural integration, good functionality, cost savings, reduced signal transmission paths, ensured signal strength, reduced electromagnetic interference, and reduced space occupation.

This application adopts the following technical solutions:

The application provides a three-phase terminal block for an electric drive system, including:

The controller terminal block is plugged and fixed on the motor housing. The controller terminal block is integrated with a low-voltage pin connection part, a high-voltage copper column and a magnetic ring. The low-voltage pin connection part and the high-voltage copper The columns are integrally injection-molded with the controller terminal block, the first end of the low-voltage pin connection part is connected to the control board, and the second end of the low-voltage pin connection part passes through the controller terminal block to form a socket slot, the resolver signal connector and the temperature signal connector are plugged into the slot and connected to the control board, the end of the high-voltage copper column passes through the controller terminal block to form a copper bar connection part, the The magnetic ring is sleeved on the outer periphery of the high-voltage copper column;

The three-phase busbar of the motor is fixedly connected with the connection part of the copper bar, and the three-phase busbar of the motor is connected with the temperature signal connector.

The present application also provides a vehicle, which includes the three-phase terminal block of the electric drive system as described above.

Description of drawings

Fig. 1 is a structural schematic diagram 1 of a three-phase terminal block of an electric drive system provided by an embodiment of the present application;

Fig. 2 is the second structural diagram of the three-phase terminal block of the electric drive system provided by the embodiment of the present application;

Fig. 3 is a structural schematic diagram 1 of the three-phase terminal block of the electric drive system plugged into the motor housing provided by the embodiment of the present application;

Fig. 4 is a schematic structural diagram of a motor three-phase busbar provided in an embodiment of the present application;

Fig. 5 is a second schematic diagram of the structure of the three-phase terminal block of the electric drive system plugged into the motor housing provided by the embodiment of the present application.

In the picture:

1. Controller wiring seat; 11. Sealing groove; 2. Motor housing; 3. Low-voltage pin connection part; 31. Pin; 32. Slot; 4. High-voltage copper column; 41. Copper row connection part; 411. Fixing hole; 5. Power module; 6. Control board; 61. Control board connector; 7. Resolver signal connector; 8. Temperature signal connector; 9. Magnetic ring; 10. Motor three-phase busbar; 101 , flexible copper row; 102, rigid copper row.

Detailed ways

The technical solutions of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The technical solution of the present application will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

The embodiment of the present application discloses a three-phase terminal block of an electric drive system, as shown in Figures 1-5, the three-phase terminal block of the electric drive system includes a controller terminal block 1, a low-voltage pin connection part 3, and a high-voltage copper column 4. Magnetic ring 9, resolver signal connector 7, temperature signal connector 8 and motor three-phase busbar 10. The low-voltage pin connection part 3, the high-voltage copper column 4, the magnetic ring 9, the resolver signal connector 7 and the temperature signal connector 8 are respectively integrated on the controller terminal block 1, and the three-phase busbar 10 of the motor is connected to the temperature signal connector 8 .

For example, the controller socket 1 is plugged and fixed on the motor housing 2 . The low-voltage pin connection part 3 and the high-voltage copper column 4 are respectively integrally injection-molded with the controller terminal block 1, the first end of the low-voltage pin connection part 3 is connected to the control board 6, and the second end of the low-voltage pin connection part 3 is pierced The controller socket 1 forms a slot 32 . The resolver signal connector 7 and the temperature signal connector 8 are respectively plugged into the slot 32 and connected to the control board 6 . The end of the high-voltage copper column 4 passes through the controller terminal block 1 to form a copper bar connection portion 41 . The magnetic ring 9 is sheathed on the outer periphery of the high voltage copper column 4 . The three-phase busbar 10 of the motor is fixedly connected to the copper bar connecting portion 41 .

In this application, the low-voltage pin connection part 3, the high-voltage copper column 4 and the magnetic ring 9 are respectively integrated and arranged on the controller terminal block 1, the low-voltage pin connection part 3 is connected to the control board 6, and the resolver signal connector 7 is connected to the temperature signal. The connector 8 is connected, the copper bar connection part 41 of the high-voltage copper column 4 is connected to the three-phase busbar 10 of the motor, so as to realize the low-voltage and high-voltage communication between the controller and the motor, and at the same time, the filtering function can be realized through the magnetic ring 9, and the structural integration is high. , Good functionality.

For example, the second end of the low-voltage pin connection part 3 is pierced through the controller terminal block 1 to form a slot 32, and the resolver signal connector 7 and the temperature signal connector 8 are respectively plugged into the slot 32 and connected to the control board 6. , to realize the connection between the resolver signal connector 7 and the temperature signal connector 8 and the control board 6, without additional adapter connectors, saving costs, reducing signal transmission paths, ensuring signal strength, reducing electromagnetic interference, and reducing space occupation.

The multiple structures of the three-phase terminal block of the electric drive system will be specifically introduced below in conjunction with accompanying drawings 1 to 5.

As shown in Figure 1 and Figure 2, the controller terminal base 1 is the terminal base on the controller, which is set to connect multiple low-voltage and high-voltage devices of the controller and the motor, so as to realize the high-voltage and low-voltage intercommunication between the two. The controller terminal block 1 is provided with a sealing groove 11.

The motor casing 2 is a protective shell of the motor, and the motor casing 2 is provided with a plug-in installation hole, and the controller terminal block 1 is plugged and fixed in the plug-in installation hole to realize fixing.

In order to realize the sealing of the connection between the controller terminal block 1 and the motor housing 2, the three-phase terminal block of the electric drive system also includes a sealing ring (not shown in the figure), and the sealing ring interferes with the controller terminal block 1 The plugging and fixing place with the motor housing 2 prevents the oil in the motor from entering the controller and affecting the normal use of the controller. In this embodiment, the sealing ring is fixed in the sealing groove 11 and abuts against the motor housing 2 to realize the limited installation of the sealing ring, taking into account both sealing and installation stability. In other embodiments, a sealing groove 11 can also be provided on the motor housing 2 or both on the motor housing 2 and the controller terminal block 1, and the limited installation of the sealing ring can also be realized. It is not limited to the scheme of this embodiment.

It should be noted that this application is not only suitable for oil-cooled motors, which can prevent oil, but also suitable for traditional water-cooled motors, which can also play a good waterproof role.

A plurality of pins 31 are provided on the low-voltage pin connection part 3 to facilitate connection and fixation of related components. It should be noted that the first end of the low-voltage pin connection part 3 refers to the end away from the motor housing 2, the second end of the low-voltage pin connection part 3 refers to the end close to the motor housing 2, and the slot 32 Set close to the motor housing 2.

The high-voltage copper column 4 is provided with three copper bar connection parts 41, and the three high-voltage copper columns 4 are respectively connected to the power module 5, so as to realize the communication between the high-voltage signal of the motor and the high-voltage signal of the controller. For example, the copper bar connecting portion 41 is provided with a fixing hole 411 so as to be connected to the three-phase busbar 10 of the motor. The injection molding part of the low-voltage pin connection part 3 and the controller terminal block 1, and the injection molding part of the high-voltage copper column 4 and the controller terminal block 1 are all coated with sealant to ensure the sealing performance, prevent oil and water, and further prevent motor The oil and gas intrusion into the controller affects the function of the controller.

The control board 6 is set away from the motor housing 2, and mainly performs current and voltage sampling, position and speed signal collection, external communication, driving of the IGBT driver board, etc., and realizes functions such as information collection, transmission, and communication control. In this embodiment, the control board 6 is welded to the pins 31 in the low-voltage pin connection portion 3 to ensure structural stability and shock resistance. In other embodiments, as shown in FIG. 5 , the control board 6 can also be connected to the low-voltage pin connection part 3 through the control board connector 61 .

The resolver signal connector 7 is connected to the rotor signal of the motor to collect the position information of the rotor to obtain the speed signal, and transmit the speed signal to the control board 6 to realize the control of the motor speed. technology, which will not be repeated here.

The temperature signal connector 8 is connected to the three-phase busbar 10 of the motor to transmit the temperature signal of the three-phase busbar 10 of the motor to the control board 6 for real-time monitoring and control. For example, by setting a temperature sensor, the temperature sensor is connected to the three-phase busbar 10 of the motor and the temperature signal connector 8, and the temperature signal connector 8 receives the signal of the temperature sensor and sends it to the control board 6 to realize the temperature signal transmission. It can be understood that the resolver signal connector 7 and the temperature signal connector 8 in this embodiment can be integrated and plugged and fixed in the slot 32 at the same time, so as to realize the connection with the controller terminal block 1. Compared with the related art The temperature signal connector 8 needs to be provided with an additional temperature signal adapter connector. The solution of the present application can reduce the structural volume and space occupation, and at the same time reduce the signal interference and improve the signal strength.

The magnetic ring 9 is sleeved on the outer periphery of the high-voltage copper column 4 and fixed to the inner wall of the controller terminal block 1 . For example, the magnetic ring 9 is a ring-shaped magnetic conductor for filtering electromagnetic waves, anti-interference, and suppressing high-frequency noise. For example, the magnetic ring 9 is integrated with the controller terminal block 1 into an injection molded part by clamping or glue dispensing, which is not specifically limited.

The motor three-phase busbar 10 includes a flexible copper bar 101 and a rigid copper bar 102 , the rigid copper bar 102 is welded and fixed to the flexible copper bar 101 , and the flexible copper bar 101 is fixedly connected to the copper bar connecting portion 41 . According to this setting, when the positioning of the controller terminal block 1 and the motor housing 2 is not accurate due to tolerance, the flexible copper bar 101 can make up for the tolerance and ensure the reliability of the connection. The situation that the controller terminal block 1 is easily damaged during vibration makes the system adaptable to a relatively severe vibration environment. For example, the flexible copper bar 101 includes U, V, and W three-phase terminals, and the U, V, and W three-phase terminals are respectively connected to the three copper bar connecting parts 41 in one-to-one correspondence, and are also connected to the U, V, and W terminals on the motor. Corresponding to W three-phase interface. For example, the flexible copper bar 101 is an elastic copper sheet, on which a fixing hole 411 is provided, and the fixing hole 411 is provided corresponding to the fixing hole 411 on the copper bar connecting portion 41 .

For example, in order to realize the connection and fixation between the three-phase busbar 10 of the motor and the high-voltage copper column 4, so as to realize the intercommunication between the high voltage of the motor and the high voltage of the controller, the three-phase terminal block of the electric drive system also includes fasteners, and the fasteners pass through the fixing holes 411 and The flexible copper bar 101 is detachably fixedly connected to the copper bar connecting portion 41 . For example, the fastener is a bolt or a screw, and at least one fixing hole 411 in the flexible copper bar 101 and the copper bar connecting portion 41 is a threaded hole, and the bolt or screw is threaded with the flexible copper bar 101 and the copper bar connecting portion 41 through the threaded hole. connect.

This embodiment also discloses a vehicle, including the three-phase terminal block of the electric drive system as described above, which has high structural integration, small volume, low cost and strong signal.

To sum up, the embodiment of the present application provides a three-phase terminal block for an electric drive system and a vehicle, which have the following advantages:

1. By integrating the low-voltage pin connection part 3, the high-voltage copper column 4 and the magnetic ring 9 respectively on the controller terminal block 1, the low-voltage pin connection part 3 is connected to the control board 6 and the resolver signal connector 7 to the temperature signal. The plug-ins 8 are all connected, and the copper bar connection part 41 of the high-voltage copper column 4 is connected to the three-phase busbar 10 of the motor, so as to realize the low-voltage and high-voltage communication between the controller and the motor. At the same time, the filtering function can be realized through the magnetic ring 9, and the structural integration is high. , Good functionality.

2. The second end of the low-voltage pin connection part 3 is pierced with the controller terminal block 1 to form a slot 32, and the resolver signal connector 7 and the temperature signal connector 8 are respectively plugged into the slot 32 and connected to the control board 6 , to realize the connection between the resolver signal connector 7 and the temperature signal connector 8 and the control board 6, without additional adapter connectors, saving costs, reducing signal transmission paths, ensuring signal strength, reducing electromagnetic interference, and reducing space occupation.

Claims

A three-phase terminal block for an electric drive system, comprising: a controller terminal block (1), a low-voltage pin connection part (3), a high-voltage copper column (4), a magnetic ring (9), and a resolver signal connector (7) , temperature signal connector (8) and motor three-phase busbar (10);

The controller terminal block (1) is plugged and fixed on the motor housing (2), and the controller terminal block (1) is integrated with a low-voltage pin connection part (3), a high-voltage copper column (4) and magnetic ring (9);

The low-voltage pin connection part (3) and the high-voltage copper column (4) are respectively integrally injection-molded with the controller terminal block (1), and the first end of the low-voltage pin connection part (3) is connected to the control The board (6) is connected, and the second end of the low-voltage pin connection part (3) passes through the controller terminal block (1) to form a slot (32);

The resolver signal connector (7) and the temperature signal connector (8) are respectively plugged into the slot (32) and connected to the control board (6);

The end of the high-voltage copper column (4) passes through the controller terminal block (1) to form a copper bar connection part (41);

The magnetic ring (9) is sheathed on the outer periphery of the high-voltage copper column (4);

The motor three-phase busbar (10) is fixedly connected to the copper bar connection part (41), and the motor three-phase busbar (10) is connected to the temperature signal connector (8).
The three-phase terminal block of the electric drive system according to claim 1, wherein the injection molding part of the low-voltage pin connection part (3) and the controller terminal block (1) is coated with sealant, and the high-voltage copper column (4) Sealant is applied to the injection molding part of the controller terminal block (1).
The three-phase terminal block of the electric drive system according to claim 1, comprising a sealing ring, and the sealing ring interferes with the connection between the controller terminal block (1) and the motor housing (2) Fixed place.
The three-phase terminal block of the electric drive system according to claim 3, wherein the controller terminal block (1) is provided with a sealing groove (11), and the sealing ring is fixed in the sealing groove (11) and abut against the motor housing (2).
The electric drive system three-phase terminal block according to claim 1, wherein the three-phase busbar (10) of the motor comprises a flexible copper bar (101) and a rigid copper bar (102) connected in phase, and the flexible copper bar ( 101) is fixedly connected to the copper bar connecting portion (41).
The electric drive system three-phase terminal block according to claim 5, further comprising fasteners, the flexible copper bar (101) and the copper bar connection part (41) are respectively provided with fixing holes (411), the The fasteners are respectively detachably and fixedly connected to the flexible copper bar (101) and the copper bar connecting portion (41) through the fixing holes (411).
The three-phase terminal block of the electric drive system according to claim 5, wherein three high-voltage copper columns (4) are provided and form three copper bar connecting parts (41), and the flexible copper bar (101 ) includes U, V, W three-phase connection terminals, and the U, V, W three-phase connection terminals are respectively connected to the three copper bar connection parts (41) in one-to-one correspondence.
The electric drive system three-phase terminal block according to claim 1, wherein the control board (6) is connected to the low-voltage pin connection part (3) through a control board connector (61).
The electric drive system three-phase terminal block according to claim 1, wherein the control board (6) is welded to the pins (31) in the low-voltage pin connection part (3).
A vehicle, comprising the electric drive system three-phase terminal block according to any one of claims 1-9.